Dee had over forty US and foreign patents issued in his name for both aviation and automotive products and the aviation companies which he founded and which bore his name held more than one hundred FAA Supplemental Types Certificates (STCs) and Type Certificate (TC).
The following is a partial listing of each.
List of U.S. Patents* Issued to Durrell U. (“Dee”) Howard
Tab#
Title
Patent No.
Issue Date
1
Reserve Fuel Systems
3,326,264
20 June 1967
2
Reserve Fuel Supply Systems
3,390,698
2 July 1968
3
Vehicle Flush Toilet
3,418,664
31 Dec 1968
4
Integral Fuel Tank
3,420,477
7 Jan 1969
5
Aircraft Main Spare Modification
3,542,320
24 Nov 1970
6
Vehicle Flush Toilet
3,609,772
5 Oct 1971
7
Sanitary Vehicle Closet
3,611,446
12 Oct 1971
8
Sanitary Closet
3,611,447
12 Oct 1971
9
Vehicle Flush Toilet
RE 27,833-Reissue of 3.418,664
11 Dec 1973
10
Trailer Coupling Means
3,825,281
23 July 1974
11
Self-Contained Sanitary Closet for Vehicles or the Like
3,858,249
7 Jan 1975
12
Apparatus for Monitoring the Condition of a Filter
3,934,543
27 Jan 1976
13
Trailer Coupling Means
3,994,510
30 Nov 1976
14
Adjustable Suspension Assembly
4,211,429
8 July 1980
15
Steering Assembly for Towed Vehicles
4,212,483
15 July 1980
16
Self-Threading Bobber
4,251,941
24 Feb 1981
17
Battery Cable Switch
4,306,126
15 Dec 1981
18
Speed Responsive Trailer Stabilizer with Zero Slack
4,313,616
2 Feb 1982
19
Remotely Adjustable Compensator for Centering Steering Systems
4,410,193
18 Oct 1983
20
Snap-Action Battery Cable Switch
4,410,775
18 Oct 1983
21
Remotely Adjustable Steering Compensator
4,418,931
6 Dec 1983
22
Remotely Adjustable Steering Compensator
4,534,577
13 Aug 1985
23
Trailer Coupling Means
RE 33,012
8 Aug 1989
24
External Sliding Aircraft Door
5,259,576
9 Nov 1993
25
Self-Adjusting Bearing Assembly
5,435,652
25 July 1995
26
Detent Centering Compensator for Vehicle Steering Systems
5,527,053
18 June 1996
27
Power Centering Compensator for Vehicle Steering Systems
5,536,028
16 July 1996
28
External Sliding Aircraft Door
5,673,874
7 Oct 1997
29
Steering Column Centering Assembly
5,816,594
6 Oct 1998
30
Sealed Self-Adjusting Bearing Assembly
5,816,731
6 Oct 1998
31
Rotary Centering Compensator or Vehicle Steering Systems
6,003,887
21 Dec 1999
32
Power Steering System with Controlled Centering
6,065,561
23 May 2000
33
Vehicle Steering Compensator with Air Actuated Trim Mechanism
6,267,395
31 July 2001
34
Steering Shaft Centering Assembly
6,272,947
14 Aug 2001
35
Center Holding Assembly for Vehicle Steering Systems
6,422,582
23 July 2002
36
Steering Stabilizer With Trimming Accumulator
6,520,520
18 Feb 2003
37
Trimming Apparatus for Steer Wheel Control Systems
6,520,519
18 Feb 2003
38
Vehicle Steering Stabilizer With Detent Ramp in Rotary Plate
6,530,585
11 March 2003
39
Precision Steer Wheel Control System with Internal Solenoid
6,817,620
16 Nov 2004
40
Steer Wheel Control System With Trimmable Rotary Plate
6,994,361
7 Feb 2006
41
Steer Wheel Control System With Dual Pistons Connected to a Common Shaft
7,118,118
10 Oct 2006
42
Precision Steer Wheel Control System With Remote Trim Valve Assembly
7,207,580
24 April 2007
43
Precision Steer Wheel Control System With External Solenoid
7,207,579
24 April 2007
44
Steer Wheel Control System With Stationary Piston and Reciprocating Cylinder
7,219,908
22 May 2007
45
Steer Wheel Control System with Reciprocating Cylinder
7,806,419
5 Oct 2010
*Some U.S. Patents were also issued in Belgium, Canada, France, Germany, Mexico and the United Kingdom
Dee Howard International Education Foundation
ATTN: Wayne I. Fagan 9901 IH 10 West, Suite 800 San Antonio, Texas 78230 P: 210.570.7888 | C: 210.240.0055 This email address is being protected from spambots. You need JavaScript enabled to view it. | www.dhedf.org
